Casio KX-724B, Service Manual & Parts List

Page: 12 / 40

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LINEAR PCB
IC300 generates the tricolor (red, green and blue) from the video signal, and IC400 controls
the TFT-LCD display.
Power Supply
H filter
SYNC SEP
Trap D.L
ACC
ACC DET
BPF
APC Killer
VCO
TINT
Demodulation
L
P
F
Matrix
Contrast INT/EXT
SW
CLAMP
Color control
R Gain
B Gain
Clamp
Bright
AGC AMP
Picture
quality
ADJ.
AGC DET
INV INV INV
γ
corrector
γ
corrector
γ
corrector
SWP GEN
COM DRIV
BGP GEN
10
12
9
27
24
26
VEE VCC1 GND VCC2 VEE
25 7 6 29 33 31 2 5 4 3 1 48 47 43 30
44
45
46
40
28
Vref
18 15 19 20 21 22 16 11 17 14 13 23 35 32 34 36
Terminal Voltage Purpose
VCC2 4.3 ~ 4.7 (V) Logic circuit
VCC4 9.5 ~ 11.0 (V) Display
VEE2 -7.0 ~ -8.0 (V) Display
VEE4 -16.5 ~ -17.9 (V) Display
IC300
VIDEO
F ADJ
ACC.F
APC.F
Killer.F
VCO
COM.
AMP
FRP
39
RGB.
INV
γ
1
γ
2
42
41
38
RGB.
AMP
H.F.OUT
TRAP
SYNC-SEP SYNC-OUT SYNC-IN TIME-CONST
COLOR
CLAMP APL AGC.FIL AGC OUT
PICTURE DCDET
R-OUT
G-OUT B-OUT
TINT
YEE
VCC1
GND
VCC2
VEE
CONT
EXT-R
EXT-G
EXT-B
SW
R-SUB-CONT
B-SUB-CONT
BRIGHT
COM.OUT